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<head>
  <meta charset="UTF-8">
  <meta http-equiv="X-UA-Compatible" content="IE=edge">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>Document</title>
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<body>
  <script type="module">
    // import WebGL from './WebGL.js'
    // if (WebGL.isWebGLAvailable()) {
    //   // Initiate function or other initializations here
    //   // animate();
    //   console.log('xxxxx');
    // } else {
    //   // const warning = WebGL.getWebGLErrorMessage();
    //   // document.getElementById('container').appendChild(warning);
    //   console.log('aaaaa');
    // }
    // 通过访问 https://cdn.skypack.dev/three 来查找最新版本。
    // 创建线条
    import * as THREE from 'https://cdn.skypack.dev/three@0.139.2';
    // 渲染器
    const renderer = new THREE.WebGLRenderer();
    // 设置渲染宽度和高度
    renderer.setSize(window.innerWidth, window.innerHeight);
    document.body.appendChild(renderer.domElement);

    const camera = new THREE.PerspectiveCamera(45, window.innerWidth / window.innerHeight, 1, 500);
    camera.position.set(0, 0, 100);
    camera.lookAt(0, 0, 0);

    const scene = new THREE.Scene();
    //create a blue LineBasicMaterial
    const material = new THREE.LineBasicMaterial({ color: 0x0000ff });
    // 带顶点的几何体
    const points = [];
    points.push(new THREE.Vector3(- 10, 0, 0));
    points.push(new THREE.Vector3(0, 10, 0));
    points.push(new THREE.Vector3(10, 0, 0));

    const geometry = new THREE.BufferGeometry().setFromPoints(points);
    const line = new THREE.Line(geometry, material);
    // 把线条添加到场景中
    scene.add(line);
    renderer.render(scene, camera);
  </script>
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